Tsar (Czar) Bomba is a nuke — this is conventional, a firecracker compared to a nuke. ALL conventional bombs are firecrackers compared to real nukes, even the first ones.
I think the North Vietnamese tried to complain that FAEs were chemical warfare weapons. I'm pretty sure FAEs were used on SAM sites. The pressure blast did a number on the radar CRTs, not to mention the lungs of the personnel manning the sites.
Oh, I didn’t realize that the Tsar Bomba was a nuke.